667390129 has 8 divisors (see below), whose sum is σ = 763070720. Its totient is φ = 571794336.

The previous prime is 667390121. The next prime is 667390133. The reversal of 667390129 is 921093766.

667390129 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 667390129 - 2³ = 667390121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (667390121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3324 + ... + 36685.

It is an arithmetic number, because the mean of its divisors is an integer number (95383840).

Almost surely, 2^667390129 is an apocalyptic number.

It is an amenable number.

667390129 is a deficient number, since it is larger than the sum of its proper divisors (95680591).

667390129 is a wasteful number, since it uses less digits than its factorization.

667390129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42399.

The product of its (nonzero) digits is 122472, while the sum is 43.

The square root of 667390129 is about 25833.8949637874. The cubic root of 667390129 is about 873.8963517783.

The spelling of 667390129 in words is "six hundred sixty-seven million, three hundred ninety thousand, one hundred twenty-nine".